Exactly how do I go to 48 volts/1000 watts?

dkw12002

10 W
Joined
Jan 11, 2012
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85
If I have a 36 volt/500-750 watt motor set up, how exactly do I ramp it up to 48 volts and 1000 watts? I mean, do I need to buy another controller and a 48 volt battery, or just the battery? Apparently my motor is a 9C motor. Would that motor even take 48 volts and 1000 watts? Thanks.
 
Hi DKW;

Open up the controller and check the capacitors. They'll have a voltage rating on them, so just make sure that's higher than the voltage you're going to put through it. If you're happy to give it a try after that, just connect a 48 volt battery to it and it'll pull the same number of amps (but at the higher voltage). If it generates ~750w at 36 volts, that's about 20 amps. So at 48v, it'll put out around 1000w.
 
9 continent motors easily take up to 1500w with no problems. This is because once you get to speed, you will typically draw only about 1000w. So the 1500w is not really continous unless climbing steep hills.

I've not yet heard of a US vendor selling a 9 continent, or 9c clone kit that could not take 48v on the controller. They may not warantee it anymore, but inside the controller there is nearly always 63v capacitors, and the other components can take 48v fine as well.

Typically the "20 amp" controllers are actually 22 amp, and on a cycleanalyst you will see peaks of 1200w when you put 48v into one. Top speed should be right around 27 mph.

If you want a bit more speed, you can get into the 34 mph ballpark with a 72v 20 amp controller. Even at that wattage, around 1500w, you should have no problems melting the motor.

A 72v 40 amp controller would likely get you into the 40 mph club, or at least into the 39 mph club. But now with up to 3000w peak power, you can definitely melt down a motor fairly quick. To run above 2000w, I defintely recomend a temp sensor on the motor.
 
Thanks for that info Dreddydave and dogman. I'll check it out and make the upgrade to 48 volts after my Amped bike is out of warranty.
 
I'm running a stock amped DD hub and controller on 50v of lipo. The controller is a 9FET infineon type with 63v caps. I just put 25 miles on it yesterday with 12mile non stop full throttle and nothing even gets warm.
 
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